Synonyms: Rifamycin B butyldipropylhydrazide;BRN 5418895;38123-26-1;Acetic acid, ((1,2-dihydro-5,6,17,19,21-pentahydroxy-23-methoxy-2,4,12,16,18,20,22-heptamethyl-1,11-dioxo-2,7-(epoxypentadeca(1,11,13)trienimino)naphtho(2,1-b)furan-9-yl)oxy)-, 21-acetate, 1-butyl-2,2-dipropylhydrazide;LS-11759;Rifamycin B, 1-butyl-2,2-dipropylhydrazide;Rifamycin, 4-O-[2-(1-butyl-2,2-dipropylhydrazino)-2-oxoethyl]-